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膜式燃气表检定装置建标需要多少准确度等级？

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膜式燃气表检定装置建标需要多少准确度等级？

浏览：42次 | 提问时间： 06-29 10:44

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以薄荷之心还之薄凉之人 06-29 10:44

(1)测量标准概述：包括测量标准目的、用途、组成、开展的检定项目、检定方法。(2)测量标准性能：应包括主要的技术指标(参数、测量范围、测量不确定度等)。(3)构成测量标准的测量器具及配套设备：应包括允许误差极限或准确度等级，有效期内检定证书。(4)检定人员：至少两名持证人员，并填写相应的检定参数(项目)。(5)校准(检定)环境条件：温、湿度均为一年内的变化，且必须符合检定规程要求。(6)测量标准不确定度的评定：略，详见前述。(7)测量标准重复性：用实验标准偏差计算。无条件的，可委托上级技术机构出数据。

臭流氓 06-29 10:53

膜式燃气表检定装置建标需要准确度等级是用该装置可完成流量范围在0.016m3?/h?～6m3?/h的家用膜式燃气表的检定和测试。?◆?装置总不确定度≤0.5%?。?◆?测量用的绝压传感器测量范围0～110kPa，准确度?≤0.2%?。?◆?微差压传感器测量范围-500Pa～500Pa，准确度?≤0.5%??◆?温度传感器测量范围0℃～50℃，准确度?≤±0.２℃。?◆?用于计时的晶振频率准确度＜10-4?◆?用于计时的晶振频率日稳定度＜10-5?◆?流量点：0.016m3/h、0.025?m3/h、0.04?m3/h、0.5?m3/h?、?0.?8?m3/h、1.2?m3/h、2.5?m3/h、4?m3/h、6?m3/h。??◆?使用条件：环境温度???20℃±5℃?相对湿度??45%―75%?大气压力??86kPa―106kPa?◆?供电电源??AC?3*220V±20V?，50Hz

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